After having her first-round match rained out here on Monday, the top-seeded American Williams promptly dismissed Croat Mirjana Lucic-Baroni 6-3, 6-3 in 79 minutes on the hardcourts at Federacao Catarinense de Tenis, where rain interrupted play once again on Tuesday.

Additional wins came for German Tatjana Malek, Hungarian Timea Babos and
Spaniard Garbine Muguruza, who is rewarded with a second-round bout against
the seven-time Grand Slam singles champion Williams.